Around ten thousand Chilean troops have been moved into areas stricken by the massive earthquake there at the weekend.
Their aim; to put a stop to riots and widespread looting.
Police used tear gas and imposed a curfew in the badly damaged town of Concepcion where hundreds of people had ransacked stores for food and other goods.
Police also made dozens of arrests after looting broke out in the capital, Santiago.
Crowds also gathered at petrol stations to siphon off fuel.
Meanwhile, the rescue operation is continuing. More than 700 are known to have been killed by the earthquake and its feared many more remain unaccounted for.
Some communities in the centre of the country remain cut off and officials say the death toll is very likely to rise.
Damage from the quake is expected to cost more than 20 billion euros. Aid money is already beginning to come in.